Connector for sections of filter cartridges



Patented Mar. 9, 1943 CONNECTOR FOR SECTIONS OF FILTER CARTRIDGES James W. Wilkinson, Providence, R. L, assignor to Fram Corporation, a corporation of Rhode Island Application November 25, 1939, Serial No. 306,121

6 Claims. (01. 210-62) moved from. a filter casing where the space in which the casing is mounted is so limited as to prevent complete vertical withdrawal of the cartridge from the casing by reason of their being insufficient height above the casing for such removal of the cartridge.

Another object of the invention is to provide an arrangement whereby two or more cartridges may be assembled one on top of the other by a clip which in efiect makes the two a single cartridge for operating purposes.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a side elevation of an assembly of cartridges by means of the clip of my invention,

Fig. 2 is a fragmental sectional view of the adjacent portions of two cartridges.

Fig. 3 is a perspective view of my clip alone.

Fig. 4 is a fragmental sectional view of the upper end of one of the cartridges.

When the head room above a filter casing is so limited that a tall cartridge may not have sufficient room for the removal of the cartridge from the casing without removal of the other parts I use a plurality of shorter length cartridges. The cartridges may be installed as sections in the filter within the two or three inches of its depth and held there by a clip until two or three other cartridges or sections have been serially attached, and when it is desirable to remove the cartridges, cartridges may be lifted together to a height sufficient to break oi the top cartridge and then lift the top cartridge and repeat the operation until all the cartridges are removed one from the other. By placing a gasket between the cartridges, the cartridge sections are held together to act as a single cartridge; and the following is a more detailed description of the present embodiment of this invention, illustrating the preferred means by which these advantageous results may be accomplished:

With reference to the drawing, I designates one cylindrical cartridge and II another cylindrical cartridge, each of which is provided with a cylindrical vertical wall with perforations therein and end walls I2. Each of these cartridges is also provided with a perforated central tubular member I3 providing an opening I4 axially through the cartridge. Each end wall is provided with inturned fingers I5 extending diagonally inwardly as illustrated more particularly in Fig. 4.

Such cartridges may be very easily attached one to the other by placing a central gasket I6 of some resilient material such as cork between the end walls l2 and then attaching a clip I! as shown in Fig, 3, consisting of a sheet of stock rolled into cylindrical form and split as at I8. The contour is formulated with a broad central rib I9, and end ribs 20 raised from the cylindrical stock 2| thereof, the ends 20 tapering to a smaller diameter along the outer surface 22, as illustrated more particularly in Fig. 3.

- By this arrangement the tapered ends 22 may be inserted into one tube I3 and beneath the spring fingers l5, while the other tapered end may be inserted into the other tube I3 and beneath its fingers I5, these fingers will engage the shoulder back of the ribs 20 so as to lock the two cartridges together which are sealed by reason of their intimate contact of the end walls I2 with the gasket I6 which will be of corkor some suitable resilient structure which will withstand oil or the filtrate material which is to be passed through the filter.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible.

I claim:

1. In combination with a pair of filter cartridges arranged in axial alignment substantially end-to-end for use in a single filter casing, each comprising a cylindrical can having inner and outer perforate cylindrical walls between which is disposed suitable filtering material, end walls provided with central openings and closing the space between said inner and outer walls, of a connection tube forming a common fluid conduit between said cartridges and having its opposite tubular end portions extending through the central openings in the opposed end walls of said cartridges into the axial space inside of the cartridges adjacent said central openings and enclosed by said inner cylindrical walls, and means carried by each cartridge extending inwardly into the central axial space thereof from its central opening and arranged about the respective tubular end portion of said connection tube to coact ii /herewith and lock the connection tube in posi- 2. In combination with a pair of filter cartridges arranged in axial alignment substantially end-to-end for use in a single filter casing, each comprising a cylindrical can having inner and outer perforate cylindrical walls between which is disposed suitable filtering material, end walls provided with central openings and closing the space between said inner and outer walls, of a connection tube forming a common fluid conduit between said cartridges and having its opposite tubular end portions extending through the central openings in the opposed end'walls of 'said cartridges into the axial space inside of the-cartridges adjacent said central openings and enclosed by said inner cylindrical walls, andmeans 4 carried by each cartridge extending inwardly into the central axial space thereof from its central opening and arranged about therespectivetubular end portion of said connection tubeto coact therewith and lock the connection tube in position, said connection tube having one wall portion split its entire length to provide a slot for per mitting the tube to contract and expand, and a gasket surrounding said tube between 'said'cartridges held in compressed relation by said connecting tube.

3. In combination, a pair of filter cartridges each having anend wall with a central opening therethrough a central'tube in communication with said openings, resilient fingers integral with said end wall and extending into said center tu-be adjacent said opening, and -a connection tube v having exterior abutments thereon extending through the central opening of said end wall inside of the center tube of each of said cartridges to engage the ends of isaid fingers and lock said cartridges together.

4. In combination, apair of filter cartridges each having an end wall and a central opening therethrough a center tube in communication with said openings; resilient fingers integral with saidend wall extending into said centertube adjacent said opening, and a split connectiontube having a-butments thereon extending through the central opening of :said end wall inside "of the center tube of' each-of said cartridges to engage the ends of said fingers and lock said cartridges together and having an inherent tendency to expand and a gasket surrounding said tube between said cartridges held in compressed relation by said connecting tube.

5. In a combination, a pair of filter cartridges each having an end wall and a central opening therethrough a center-tube in communication with said openings, a connection tube extending through the central opening of said end wall inside of the center tube of each of said cartridges,

means oneach of said cartridges within the openlingfthereof arranged to coact with and lock the .connection in position, and a resilient gasket about'said connection tube and snugly engaging the opposed end walls of said cartridges to seal nector in the assembled relationship of the parts,

and resilient metal fingers surrounding said central opening and projecting inwardly into the center-tube about the adjacent end'thereof, said connector 1 comprising a compressible gasket tubular member extending through thegasketand having a longitudinal islotex-tending the-entire length ofsaid member and formed through one sid-e't-hereonan'd including a broad central circumferential rib and --a cylindrical telescoping part of smaller diameter :arranged at opposite sidesof said cent-ralrib with circumferential end ribs eat the free endsof said telescopin parts: to provide shoulders for '-engaging the :ends of said fingers when the telescoping parts'are inserted through said central openings into the center tubes of the cartridges with the end ribs positioned behind said fingers,-.the outer surfaces of said end ribs :being tapered to asmaller diameter toward the ends of said member.

JAMES -W. WILKINSON. 

